cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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smartconnect.c (953B)

      1// SPDX-License-Identifier: GPL-2.0+
      2/*
      3 *  Copyright 2013 Matthew Garrett <mjg59@srcf.ucam.org>
      4 */
      5
      6#include <linux/acpi.h>
      7#include <linux/module.h>
      8
      9MODULE_LICENSE("GPL");
     10
     11static int smartconnect_acpi_init(struct acpi_device *acpi)
     12{
     13	unsigned long long value;
     14	acpi_status status;
     15
     16	status = acpi_evaluate_integer(acpi->handle, "GAOS", NULL, &value);
     17	if (ACPI_FAILURE(status))
     18		return -EINVAL;
     19
     20	if (value & 0x1) {
     21		dev_info(&acpi->dev, "Disabling Intel Smart Connect\n");
     22		status = acpi_execute_simple_method(acpi->handle, "SAOS", 0);
     23	}
     24
     25	return 0;
     26}
     27
     28static const struct acpi_device_id smartconnect_ids[] = {
     29	{"INT33A0", 0},
     30	{"", 0}
     31};
     32MODULE_DEVICE_TABLE(acpi, smartconnect_ids);
     33
     34static struct acpi_driver smartconnect_driver = {
     35	.owner = THIS_MODULE,
     36	.name = "intel_smart_connect",
     37	.class = "intel_smart_connect",
     38	.ids = smartconnect_ids,
     39	.ops = {
     40		.add = smartconnect_acpi_init,
     41	},
     42};
     43
     44module_acpi_driver(smartconnect_driver);